Recent and upcoming talks by Hossein Lamei Ramandi

Hossein Lamei Ramandi: A minimal Kurepa tree with respect to club embeddings

Place: Fields Institute (Room 210) Date: July 6, 2018 (13:30-15:00) Speaker: Hossein Lamei Ramandi Title:  A minimal Kurepa tree with respect to club embeddings Abstract:  We will prove that it is consistent with CH that there is a Kurepa tree which club embeds into all of its Kurepa sub trees. continue reading…

Hossein Lamei Ramandi: A rough classification of non $\sigma$-scattered linear orders

Place: Fields Institute (Room 210) Date: November 11, 2016 (14:00-15:00) Title: A rough classification of non $\sigma$-scattered linear orders Abstract: We prove that under $PFA^+$ every non $\sigma$-scattered linear order contains a real type, an Aronszajn type, or a ladder system indexed by a stationary subset of $\omega_1$ equipped with a lexicographic order or reverse lexicographic order. continue reading…